Electric grounding connection



Patented Feb. Z8, 1928.

UNITED sra'resl )PATENT OFFICE.,

WHEEVLER H.. VIBBER, OF NEW LONDON, CONNEZCTICUT, ASSIGNOR OF ONE-HALF T0 THE GILLETTE-VIBBER C0., -OF NEW LONDON, CONNECTICUT, A CORPORATION 0F CONNECTICUT.

Appiicatin med February This invention relates to grounding and bonding electrical circuits and conduits and more particularly to an improved ground connection to a water`pipe or other piping system. A principal object of the invention is to provide a simple, ie'ective and reliable means for connecting al conduit and a groundwire to a water or other 'grounding-y ipe, such means including provision Where-g Ey the protective' conductor pipe or tube 1n which the groundwire is'encased may be' securely clamped to the groundlng pipe in any desired angular relation thereto. The foregoing and other obgects and advantages of the invention will more fullyappear from the following detailed description taken in connection with the accompanying drawings, and the distinctive features 'of novelty will bepointed out in the appended claims. l p

-Referring to the drawings:

Fig. 1 is an elevation showing an embod1- ment of my invention and showing a portion of the grounding pipe and also of the protective conductor pipe.y

Fig. 2 is a similar view with a clamping member removed and with a portion -in section' i 0 Fig. 3 is a transverse section on the line 3-3 of Fig. 1; and l 1 Fig.4 4 is an elevation' partly vin section showing a modified form of theinvention.

1 10 indicates a ground pipe such as a water pipe employed in the ordinary Water service of a building. 11 indicates a fixture in the form'of an internally lthreaded coupling ,se curing adjacent ends of the water pipe sections together. In accordance with my invention in its present preferred embodiment, thiscoupling is specially formed w'ith a tapering or frusto-conical' boss 12 at one side and intermediate the length thereof. 13 indicates a bracket head or conduit holder having one portion thereof formed with a tapering socket 14 'adapted to fit upon the boss 412 and having another'portion. there'- of formed as. an .internally threaded collar or bracket 15, the threaded bore of which is adapted to receive the externally threaded extremity of a protective conductor pipe or conduit 16, which conductor pipe may beA clampedfsecurely to the collar 15 bya set screw 18. Grooyes 20'extend from one end ELECTRIC GRONDING CONNECTION.

6, 1925. Serial N0. 7,3?2.

of the socket 14 to the other along diametrif cally opposite portions of the inner socket wa1l,-either 'of these grooves being adapted 4to receive the exposed end portion ofthe conductor wirel'? and each groove -20 is ex tended outwardly. across the outer end of the socket 14 as indicated at A19. The boss 12 is tapped to receive a screw 21 for clamping the holder 13 to the pipe coupling 11.

A washer'22 appliedl under the head`21A of.

the screw 21 is adapted to engage..,and clamp the wire 17 fi-rml'y in one of the notches 19,

while as said screw is set up the extremity of the wire tucked into the socket wall notch u i 20 is pressed firmly against the boss 12 thus insuring an enective contact area at all times of the conductor wire with the groundf ingpipe.. As, will be noted .from a comadjust the protective con-ductor 16 at any desired angle with respectto the grounding pipe and on then setting up the screw 21 the "conductor is securely locked in such position which may be in all respects similar to the bracket head 13 already described and hav# ing a screw 21 tapped into the spindle to clamp this bracket head-thereto. The collar socket`15- of this'bracket head to receive the protective conduit may be the same as the collar already' described; and it is here to be understood that in either case this socket may extend at any angle to' the tapered socket or it may be parallel therewh as` may be found necessary or desira e. v

..I am aware -that the invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and I .therefore Vdesire the present embodiment to be considered in all respects as illustrative and not restrictive,

.parison of Figs. 1 and 2 itis .possible to 'i reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having described my invention,l what I claim as new and desire to secure by Letters Patent is:

` 1. An electric connection com rising a fixture for attachment to a groun ing pipe a iixture for attachment to a conduit bearing a conductor Wire, one of said fixtures having a tapering .socket and the other iixtuie having a tapering bossy shaped to fit within said socket, and means for rigidly securing said ixtures together with said boss seated within said socket and for clamping one end of the conductor wire to one of said fixtures.

2. An electric connection comprising a fixture for attachment to a grounding pipe, a tapering boss on said fixture, a fixture for attachment to a conduit bearing a conductor wire, said fixture having a tapering socket shaped to fit said boss, and clamping-means vfor rigidlysecuring said fixtures together in any desired angular position of one relatively to the other about the axis of said boss and for securing said wire to one of said fixtures.

3. An electric connection comprising a coupling` for connecting two .sections'of piping, a tapering boss on said coupling having a tapped hole therein, a conduit holder having a taperingl socket 'for fitting said boss, and a clamp screw engaged Within said tapped hole for securing the conduit holder to said coupling in any desired position of adjustment about said boss :isa pivot.

4. An electric connection comprising an internally threaded pipe coupling, a frusto-L conical boss on said'coupling having its axis intersecting the axis of' said coupling at right` angles, a conduit holder having a tapering socket to iit said boss, the inner wall of the socket being grooved to 'receive' a conductor wire. and means for Wedging r said boss Within said socket and for clamp ing said wirewithin said groove.

5. -An electric connection comprising a coupling forconnecting two pipe sections,

a boss on said coupling havinga tapped hole therein, a bracket having a socket to receive said boss and a bore for 4receiviing a conduit bearing a conductor wire, the inner wall of the socket being giooved to receive one end of Ysaidivire inserted between said boss and said., bracket, and a clamp screw engaged within said tapped hole for adjustably securing said bracket to said coupling.

6.` An electric connection comprising a coupling for connecting two sections of grounding pipe, a besson said coupling said boss and said socket and lying across said notch and in said groove, and au headed clamp screw engaged within said tapped hole-for adjustably securing said bracket to Said coupling.l 1

In testimony whereof I affix my signature.

` Wiiieiennii H.' viBBiiR. 

